Why Can I Receive Calls After Porting but Not Make Them?

A successful number transfer should feel invisible.

You insert your new SIM, your old number appears, and everything continues exactly as before.

But sometimes something strange happens.

People can call you.

Your phone rings normally.

Yet when you try to call someone else, the call fails.

No connection.

No ringing tone.

Sometimes an error message appears.

This is usually linked to outgoing call activation, SIM provisioning or account settings after a port.

The number transfer itself may have worked correctly.

The problem is that your new network has not fully enabled outgoing services.

The Number That Could Only Receive Calls

Daniel switched providers and kept his existing number.

His partner called him.

It worked.

His employer called.

It worked.

He assumed everything was sorted.

Then he tried calling his bank.

The call immediately disconnected.

He restarted the phone.

Same problem.

The issue was not his number.

His incoming routing had updated correctly, but his new SIM was not fully provisioned for outgoing voice services.

This is a classic post-port activation problem.

Why Can Incoming Calls Work But Outgoing Calls Fail?

Incoming and outgoing calls are handled differently.

When somebody calls you:

Other network → Mobile routing system → Your new provider → Your phone

When you call someone:

Your phone → Your provider → Destination network

A problem on either side can stop outgoing calls.

Common causes include:

Problem	What it means
SIM not fully activated	Network has not enabled all services
Port incomplete	Some account systems still updating
Incorrect network settings	Phone is not registering correctly
Account restriction	Calls blocked at account level
VoLTE issue	Voice service not configured correctly

First Check: Can You Use Mobile Data?

This simple test helps narrow things down.

If:

• Data works
• Incoming calls work
• Outgoing calls fail

The issue is likely voice provisioning rather than general network connection.

If nothing works:

• Data
• Calls
• Texts

then the SIM activation itself may not be complete.

Restart the Network Connection

The easiest fixes are still worth trying.

Restart Your Phone

A restart forces your SIM to reconnect.

Toggle Airplane Mode

Turn Airplane Mode on.

Wait 30 seconds.

Turn it off.

Your phone will perform a fresh network registration.

Check Preferred Network Mode

On Android:

Settings → Network & Internet → SIMs

Make sure your phone is not restricted to a mode that prevents voice service.

On iPhone:

Settings → Mobile Service → Mobile Data Options

Check that voice and data settings are enabled correctly.

Could It Be a VoLTE Problem?

Yes.

Modern mobile networks increasingly rely on Voice over LTE (VoLTE) for calls.

Older 3G voice systems are being retired in many countries, making VoLTE support more important.

If your SIM, phone or account is not correctly configured, voice calls may fail even though mobile data works.

This is especially relevant after switching providers because the network needs to associate your device correctly with its voice services.

Test Different Numbers

Try calling:

• A family member
• Another mobile network
• A landline
• Customer support

The pattern matters.

If every outgoing call fails, the issue is likely your SIM or account.

If only one number fails, the issue may be on the receiving side.

Do Not Reset Everything Immediately

A common mistake is immediately:

• Factory resetting the phone
• Deleting network settings
• Changing APNs repeatedly

These rarely fix a porting activation problem.

If the network has not enabled outgoing voice correctly, no amount of phone resetting will change the backend.

When Should You Contact Your Provider?

Contact support if:

• Port completed more than 24 hours ago
• Incoming calls work
• Outgoing calls fail consistently
• Restarting has not helped

Provide:

• Your number
• Port completion date
• Phone model
• Whether data works
• Whether SMS works

That information speeds up investigation.

Where Talk Home Mobile Fits

Talk Home Mobile supports number transfers through the standard UK PAC process.

If a customer can receive calls after moving their number but cannot make them, Talk Home support can check whether:

• The port completed correctly
• Voice services are enabled
• The SIM is correctly provisioned
• VoLTE settings are active

Most post-port voice problems are configuration issues rather than damaged SIM cards.

Final Thoughts

A number port is not complete just because your old number appears on your phone.

Several systems need to agree.

If people can call you but you cannot call them, your number transfer probably worked.

The missing piece is usually outgoing voice activation.

Give the phone a fresh connection first.

If the problem continues, let your provider check the network side.